Recently Savannah has been up and down due to problems--possibly with the system's RAID controller. Currently, Savannah is online, the disks are resynced, a fresh backup of Savannah has been made, and all systems are running properly. We suspect that some part of the hardware (controler, motherboard, etc) could make the system's load peak under high load and eventually reboot. The FSF sysadmin are investigating this possible hardware issue.